Compressor-controlling means



Patented Dec. 16, 1924.

UNETED STATES PATENT WADE H. VJINEMAN, OF CHICAGO, ILLINOIS, ASSIGIGEOR T SULLIVAN l/LACHINERY COMPANY, A CORPORATION 03: TiEAiESACHUSETTS.

COMPRESSOR-CONTROLLING lVIEA NS.

Application filed January 10, 1921.

To all whom it may concern:

Be it known that I, WVADE H. l VINEMAN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Compressor-Controlling Means, of which the following is a full, clear, and exact specification.

My invention relates to compressor controlling means.

An object of my invention is to provide an improved compressor controlling mechanism. Another object of my invention is to provide an improved compressor unloading mechanism having improved controlling means. A further object of my invention is to provide an improved mechanical unloading means for a compressor provided with improved receiver pressure responsive controlling means. Other objects of my invention will appear in the course of the following specification and the appended claims.

In the accompanying drawings I have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings,

Fig. 1 is a side elevation ot acompressor provided with the illustrative embodiment of 30 my improved controlling means.

Fig. 2 is a section taken substantially on the line 22 of Fig. 1, and showing my improved controlling means in elevation.

Fig. 8 is a section on a plane similar to the plane of the section of Fig. 2, but cutting the parts of my improved controlling means centrally and with parts omitted for purposes of clearness.

Fig. 4 is an enlarged view of my controlling means from the same viewpoint as Fig. l and having the fluid pressure governed portion thereof shown in section for purposes of illustration.

I ha re shown the illustrative form of my improved controlling mechanism attached :i'or use to a compressor 1 of the compound type which has low and high pressure cylinders. respectively 2 and 3, connected by an intercooler e and pistons of usual construction (not shown) reciprocable in the cylinders under the action of a crank shaft 5. The low pressure cylinder 2 is provided with an intake pipe 6 having an enlarged casing T at the top thereof and a well-known type of intake unloader valve 8 is housed in said Serial No 436,215.

casing 1 ad is adapted to cooperate with suitable seats 9 to close the intake when it is desired to unload the compressor.

The casing 7 is provided with a top 10, and mounted upon this top is a hanger li in which is journaled a shaft 12, on one end of which is keyed a crank disc 13 having a crank pin ll connected by means of a link 15 with the stem 16 ot' the valve 8. It will be obvious that rotation of the shaft 12 will cause rotation oi the crank disc 13 andwill result in opening and closing the valve 8. Keyed to the shaft 12 on the opposite side of the pedestal or hanger 1i and slidable with respect thereto is a disc 17 provided with a friction facing 18 and normalh; forced over away from the center of the shaft by a spring 20 (see Fig. 3). F or the purpose oi actuating the shaft to cause opening and closing of the intake valve 8, I have mouned adjacent the end thereof and outside 01" the disc 17 a freely rotatable ratchet wheel 2i with which the racing 18 frictionally contacts under the influence of the spring 20, and likewise pivoted upon the shaft an arm 22 carrying a pawl 23 normally held in contact with the teeth of the ratchet wheel by a spring This arm 22 is connected by a link 26 with an oscillating lever which receives its motion from the crank shaft 5 by means of a link 27. Thus it will be evident that during the entire period oi running or the compressor the arm is oscillated and the ratchet wheel 21 intern'iittently but steadily rotated.

For the purpose of controlling the rotation of the shaft by the ratchet wheel 21, I have keyed to the shaft 12 between the disc 13 and the pedestal or hanger ll, a collar 28 provided with oppositely extending arms 29 and 30. These arms are oi different length and are provided with laterally projecting stops 29 and 84). Cooperating with these stops is a plunger member 31 having an opening 32 of greater width than the width of said stops in the side thereof adjacent the stops 29 and and adapted to be posi tioned relative to the shaft 12 and accordingly to the stops 29 and 30 by a fluid pressure controlled diaphragm 31. The diaphragm 31 is mounted in a suitable casii 33 and is snbjc'te-il upon its side remote from the shaft to receive pressure by means of a pipe 3%. For the purpose of operating element active during the running varying the response of the diaphragm to receiver pressure, I place a spring 35 between the diaphragm 31 and an adjustable threaded member 36, and the member 36 likewise serves to center and guide the plunger 31.

Looking at Fig. 4, it Will be obvious that as the receiver pressure rises to a predetermined amount, the plunger 31 will be moved to the left and will bring the opening 32mider the stop 30" in such manner as to permit the latter to pass through the opening and thereby permit rotation of the shaft 12 for. half a revolution. This will change the position of the valve 8 from open to closed, 'aiid'i'urther rotation of the crank disc 13 Will be'preve'n'te'd by engagement ofthe outer edge of thestop 29 vvith'the right hand edge of the opening 32. Upon reduction in pressure in the receiver. 'hovvevei; below a predetermined desired limit, the spring 35 Will iorce over the diaphragm toward the right and Will cause the release of the stop member 29 and permit its passage through the opening 32 thereby permitting the shaft'12 and crank disc 13 to rotate anotherihalf revolution and open the intake valve 8. 'It'will be obvious that this mechanism will operate to close or to open the intake valve in ac- 1' ordance with the compressor discharge pressure in such manner as to maintain a nearly Constant receiver pressure.

V In the present application I do not claim the combination of a compressor, a compres sor controlling mechanism comprising an of the compressor, means operable thereby for effecting loading and unloading of the compressor, and a member controlled by compressor discharge pressure and controlling the operation of said means by said element, subject matter of that scope being disclosed in my copending application, Serial No. 436,217, filed Jan. 10, 1921, in

Which application any common subject matter Will be covered. ,7 v

While I have in this application specifically described one form Which my invention may assume in practice, it Will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in other forms Without departing from its spirit or the scope of the appended claims, I What I claim as new and desire to secure by Letters Patent is: I

1. In a compressor controlling mechanism, a member intermittently rotating during the running of the compressor, means adapted to be actuated thereby to etl'ect loading or unloading of said compressor, and means controlled by compressor discharge pressure controlling the actuation of said first mentioned means by said member. 2."In a compressor controlling mechanism, a member intermittently rotating during' the running of the compressor, means operative When rotated thereby to effect loading of said compressor, and means controlled by compressor discharge pressure and operative in one position to prevent and in another position to permit rotation of said first mentioned means by said member.

In a compressor controlling mechanism, a member intermittently rotated during the running of the compressor, means adapted to be rotated thereby to effect unloading of said compressor, and means controlled by compressor discharge pressure and operative in diti'erent positions thereof respectively to permitand to prevent rotation of said first mentioned means by said member.

1. In a compressor controlling mechanism, a member intermittently rotated'during the running ot the compressor, means adapted to be rotated thereby to effect loading of said compressor, a friction clutch between said member and means, and means controlled by compressor dischiar 'e pressure and operative to maintain said first mentioned means stationary or to permit its rotation in accordance with compressor discharge pressure. a

Ina compressor controlling mechanism, a member adapted for rotation during the running of the compressor, a member .irictionally connected with said first mentioned member and operative when turned through halt a. revolution to change the condition of said compressor from loaded to unloaded, and means controlled by compressor discharge pressnre for normally holding said second mentioned member immovable, but operable by compressor dischargepressure variations to permit rotation of said secondmentioned member through half a revolution.

(3. In a compressor controlling mechanism,

a member rotating during the loading of the compressor, a member adapted to be rotated thereby to eftect loading and unloading of said compressor, a rotary motion oi halt a revolution operating to change the condition of the compressor from loadedt-o ferent length and laterally projecting stops on said arms, and means controlled by compressor discharge pressure variations and normally engaging one of said stops but operative When said discharge pressure is in excess of a predetermined value to release one of said stops and to engage the other and when said pressure falls below said predetermined value to release said last mentioned stop and engage the first.

b. in a compressor controlling mechanism, a member operative in different positions to cause loading and unloading of a compressor, and frictional driving means for said member.

J. In a compressor controlling mechanism, a member operative in different positions to cause loading and unloading of a compressor, frictional driving means for said member, and means cooperating With said member to positively lock or release it With respect to said frictional drive.

it). In a compressor controlling mechanism, actuating means operating continuously during the running of the compressor, and unloading means governed by pressure variations and actuated by said ac tuating means, the actuation of said unload ing means by said actuating means being positively prevented except during transition from loaded to unloading position and vice versa.

ll. In a con'ipressor controlling mechanism, an unloader valve having positions in which the compressor is loaded and unloaded, means tending to move said valve from either of said positions to the other and operative during compressor running, and pressure responsive controlling means for said valve.

12. In a compressor controlling mechanism, a. member rotatable during running of the compressor, a member nonpositively connected in driving relation to said first mentioned member and operative upon movement to load and unload a compressor, and means governed by compressor discharge pressure for governing the responsiveness of said second mentioned member to rotation of said first mentioned member.

13. In a compressor controlling mecha nism, a member adapted for rotation during the running of the compressor, a meniber frictionally connected with said first mentioned member and operative when. turned through a fraction of a revolution to change the condition of saidcompressor from loaded to unloaded, and means controlled by compressor discharge pressure for normally holding said second mentioned member immovable but operable by compressor discharge variations to permit rotation of said second mentioned member through the necessary fractional part of a revolution to effect said changes in the condition of the compressor.

14. In a compressor controlling mechanism, a member adapted for rotation during the ruiming of the compressor, a member frictionally connected With said first mentioned member and operative when turned through a predetermined angle to change the condition of said compressor from loaded to unloaded, and means controlled by compressor discharge pressure for normally holding said second mentioned member immovable but operable by compressor discharge pressure variations to per-- mit rotation of said second mentioned memher through said predetermined angle.

15. In a compressor controlling mechanism, a member operative upon rotation to different angular positions respectively to load and unload a compressor, compressor discharge pressure controlled means for alternately stopping and freeing said member, and means associated with said member for rotating the same and operative to effect rotation thereof When said member is free.

16. In a compressor controlling mechanism, a member operative on movement to difierent positions respectively to load and unload a compressor, compressor discharge pressure controlled means for holding said member in its different positions and releasing the same, and means associated with said member for causing movement thereof alternately to said different positions When the same is released.

17. In a compressor controlling mechanism, a member rotating during the running of the compressor, means adapted to be directly actuated thereby to effect loading or unloading of said compressor, an means controlled by compressor discharge pressure controlling the actuation of said first mentioned means by said member and permitting actuation thereof at the maximum and minimum pressures desired but preventing actuation at intermediate pressures.

18. In a compressor controlling mechanism, a member operative in different p0sitions to cause loading and unloading of a compressor, and nonpositive driving means for said member.

In testimony whereof I affix my signature.

WADE H. WINEMAN. 

